Talked to them briefly at a booth at a career fair--handed them my resume. 3 weeks later, I received a follow-up email inviting me to a day-long interview/presentation day at the company. There was, if I remember correctly, a presentation, than one interview with the manager I would be working two levels under, a lunch / presentation, then one more interview with the person who would have been my direct manager. Both interviews were very causal--very few technical questions.